Precautions for PC connection to RCON gateway unit grounded at positive terminal of 24 VDC power supply
Intro-14
ME0384-4A
If the gateway unit is grounded at the positive terminal of the 24 VDC power supply, use an
SIO isolator (RCB-ISL-SIO) as shown in the diagram below when connecting a PC to the
SIO connector of the gateway unit.
If a PC is connected to the gateway unit without using an SIO isolator, the power will
short-circuit and cause the PC to malfunction.
Caution
● RS-232 conversion unit (RCB-CV-MW) cannot be used.
GND
FG
PC
Conversion unit
(RCB-CV-USB)
5 V
SGA
SGB
GND
FG
5V1
SGA SGA1
SGB SGB1
GND GND1
FG
Gateway
unit
RS-485
communication
SIO isolator
(RCB-ISL-SIO)
Isolator communication cable
CB-RCB-SIO***
will be required separately.
Cable included with PC software (RCM-101-USB)
(USB cable (CB-SEL-USB030) & conversion unit (RCB-CV-USB))
Cable included with PC software (RCM-101-USB)
(Communication cable (CB-RCA-SIO050))
5 V
SGA
SGB
GND
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